import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.util.Date;

/**
 * Created by ScorpionOrange on 2016/09/20.
 * A frame that contains settings for selecting various option dialogs.
 */
public class OptionDialogFrame extends JFrame{
    private ButtonPanel typePanel;
    private ButtonPanel messagePanel;
    private ButtonPanel messageTypePanel;
    private ButtonPanel optionTypePanel;
    private ButtonPanel optionsPanel;
    private ButtonPanel inputPanel;
    private String messageString = "Message";
    private Icon messageIcon = new ImageIcon("blue-ball.gif");
    private Object messageObject = new Date();
    private Component messageComponent = new SampleComponent();

    public OptionDialogFrame(){
        JPanel gridPanel = new JPanel();
        gridPanel.setLayout(new GridLayout(2, 3));

        typePanel = new ButtonPanel("Type", "Message", "Confirm", "Option", "Input");
        messageTypePanel = new ButtonPanel("Message Type", "ERROR_MESSAGE", "INFORMATION_MESSAGE",
                "WARNING_MESSAGE", "QUESTION_MESSAGE", "PLAIN_MESSAGE");
        messagePanel = new ButtonPanel("Message", "String", "Icon", "Component", "Other", "Object[]");
        optionTypePanel = new ButtonPanel("Confirm", "DEFAULT_OPTION", "YES_NO_OPTION",
                "YES_NO_CANCEL_OPTION", "OK_CANCEL_OPTION");
        optionsPanel = new ButtonPanel("Option", "String[]", "Icon[]", "Object[]");
        inputPanel = new ButtonPanel("Input", "Text field", "Combo box");

        gridPanel.add(typePanel);
        gridPanel.add(messageTypePanel);
        gridPanel.add(messagePanel);
        gridPanel.add(optionTypePanel);
        gridPanel.add(optionsPanel);
        gridPanel.add(inputPanel);

        //add a panel with a Show button
        JPanel showPanel = new JPanel();
        JButton showButton = new JButton("Show");
        showButton.addActionListener(new ShowAction());
        showPanel.add(showButton);

        add(gridPanel, BorderLayout.CENTER);
        add(showPanel, BorderLayout.SOUTH);
        pack();
    }

    /**
     * Gets the currently selected message.
     * @return a string, icon, component, or object array, depending on the Message panel selection.
     */
    public Object getMessage(){
        String s = messagePanel.getSelection();
        if(s.equals("String")){
            return messageString;
        }
        else if(s.equals("Icon")){
            return messageIcon;
        }
        else if(s.equals("Component")){
            return messageComponent;
        }
        else if(s.equals("Object[]")){
            return new Object[] { messageString, messageIcon, messageComponent, messageObject };
        }
        else if(s.equals("Other")){
            return messageObject;
        }
        else {
            return null;
        }
    }

    /**
     * Gets the currently selected options.
     * @return an array of strings, icons, or objects, depending on the Option panel selection
     */
    public Object[] getOptions(){
        String s = optionsPanel.getSelection();
        if(s.equals("String[]")){
            return new String[] { "Yellow", "Blue", "Red" };
        }
        else if(s.equals("Icon[]")){
            return new Icon[] {
                    new ImageIcon("yellow-ball.gif"),
                    new ImageIcon("blue-ball.gif"),
                    new ImageIcon("red-ball.gif") };
        }
        else if(s.equals("Object[]")){
            return new Object[] { messageString, messageIcon, messageComponent, messageObject };
        }
        else {
            return null;
        }
    }

    /**
     * Gets the selected message or option type
     * @param panel the Message Type or Confirm panel
     * @return the selected XXX_MESSAGE or XXX_OPTION constant from the JOptionPane class
     */
    public int getType(ButtonPanel panel){
        String s = panel.getSelection();
        try{
            return JOptionPane.class.getField(s).getInt(null);
        }
        catch (Exception e){
            return -1;
        }
    }

    /**
     * The action listener for the Show Button shows a Confirm, Input, Message, or Option dialog
     * depending on the Type panel selection.
     */
    private class ShowAction implements ActionListener{
        public void actionPerformed(ActionEvent event){
            if(typePanel.getSelection().equals("Confirm")) {
                JOptionPane.showConfirmDialog(OptionDialogFrame.this, getMessage(), "Title",
                        getType(optionTypePanel), getType(messageTypePanel));
            }
            else if(typePanel.getSelection().equals("Input")){
                if(inputPanel.getSelection().equals("Text field")){
                    JOptionPane.showInputDialog(OptionDialogFrame.this, getMessage(), "Title",
                            getType(messageTypePanel));
                }
                else {
                    JOptionPane.showInputDialog(OptionDialogFrame.this, getMessage(), "Title",
                            getType(messageTypePanel), null, new String[]{ "Yellow", "Blue", "Red" },
                            "Blue");
                }
            }
            else if(typePanel.getSelection().equals("Message")){
                JOptionPane.showMessageDialog(OptionDialogFrame.this, getMessage(), "Title",
                        getType(messageTypePanel));
            }
            else if(typePanel.getSelection().equals("Option")){
                JOptionPane.showOptionDialog(OptionDialogFrame.this, getMessage(), "Title",
                        getType(optionTypePanel), getType(messageTypePanel), null,
                        getOptions(), getOptions()[0]);
            }
        }
    }
}

/**
 * A component with a painted surface
 */
class SampleComponent extends JComponent{
    public void paintComponent(Graphics g){
        Graphics2D g2 = (Graphics2D) g;
        Rectangle2D rect = new Rectangle2D.Double(0, 0, getWidth() - 1, getHeight() - 1);
        g2.setPaint(Color.YELLOW);
        g2.fill(rect);
        g2.setPaint(Color.BLUE);
        g2.draw(rect);
    }

    public Dimension getPreferredSize(){
        return new Dimension(10, 10);
    }
}
